Transcript Document 7843811

Harvard Neutrino Group
DoE Review
August 21, 2006
Introduction

The Harvard Neutrino Group is engaged in three
highly related experiments

MINOS: 5 kT, magnetized iron-scintillator detector,
optimized for observing nm oscillations

MIPP: A fixed-target particle production experiment
whose results will improve the near-far detector
comparisons in MINOS

NOnA: A proposed follow-on experiment to MINOS, offaxis 20-25 kT totally-active liquid scintillator detector,
optimized for observing ne oscillations
DoE Review
August 21, 2006
Gary Feldman
Harvard Neutrino Group




Faculty: GF
Engineers: John Oliver, Nathan Felt
Postdoc: Mayly Sanchez
Graduate Students: Joshua Boehm, Andre
Lebedev, Sharon Seun, Steve Cavanaugh*
DoE Review
August 21, 2006
Gary Feldman
MINOS Layout
(Main Injector Neutrino Oscillation Search)
DoE Review
August 21, 2006
Gary Feldman
MINOS Far Detector







8m octagonal tracking
calorimeter
486 layers of 1 in iron plates
4.1 cm-wide scintillator strips
with WLS fiber readout, read
out from both ends
8 fibers summed on each
PMT pixel
25,800 m2 (6.4 acres) of
active detector planes
Toroidal magnetic field
<B> = 1.3 T
Total mass 5.4 kT
DoE Review
August 21, 2006
Half of MINOS
far detector
Gary Feldman
MINOS Detectors
Far Detector
Near Detector
DoE Review
August 21, 2006
Gary Feldman
Harvard Contributions
to MINOS





Far detector front-end electronics
Contributions to the C++ framework and the
development of the “Standard Reconstruction.”
Production processing on the Fermilab computer
farm and data quality validation
Development of offline analysis for nm  ne
oscillations
MINOS positions


GF: Executive Committee
Mayly Sanchez : Farm Batch Processing Group
coordinator, Validation and Monitoring Group convener,
and nm  ne Working Group Co-convener:
DoE Review
August 21, 2006
Gary Feldman
MIPP Experiment
Main Injector Particle Production Experiment
DoE Review
August 21, 2006
Gary Feldman
Why do the MIPP Experiment?

Our main interest is to reduce the uncertainty in
the near-far ratio for MINOS and other oscillation
experiments.

Not the same due to the line source of neutrinos.
Target
DoE Review
Near
August 21, 2006
Far
Gary Feldman
Far to Near Ratio
DoE Review
August 21, 2006
Gary Feldman
MIPP Measurements




Unlike previous measurements, MIPP has a full
acceptance. It will produce a library of produced
particles.
We have taken 1.9M events with 120 GeV protons
on the MINOS target.
We have also taken 20, 58, and 120 GeV
secondaries on thin carbon targets and will use
them to “reconstruct the MINOS (or any other
carbon target).
Expect first results by the end of 2006.
DoE Review
August 21, 2006
Gary Feldman
Harvard Contributions
to MIPP






RICH detector hardware and software.
Data acquisition.
Trigger
Beamline improvements
General reconstruction and Monte Carlo programs.
MIPP Positions:

GF: Chair of the MIPP Institutional Board
DoE Review
August 21, 2006
Gary Feldman
What is NOnA?

NOnA is an approved Fermilab experiment



20-25 kT totally-active liquid scintillator detector
Situated 12 km off the NuMI beamline 810 km from
Fermilab (in a narrow band neutrino beam around the first
oscillation maximum)
Designed to be sensitive to nm  ne oscillations, needed
for
• sin2(2q13)
• Mass ordering
• CP violating phase d
DoE Review
August 21, 2006
Gary Feldman
Off-Axis Rationale

Both Phase 2 experiments, NOnA and T2K are
sited off the neutrino beam axis. This yields a
narrow band beam:

More flux and less background (ne’s from K decay and
higher-energy NC events)
En 
0.43  m 
1  2q 2

DoE Review
August 21, 2006
Gary Feldman
NOnA Far Detector
Qu ic kTi me™ a nd a
TIFF (LZW)d ec omp res so r
are n ee de d to s ee th is pi ctu re .
“Totally Active”
20 kT:
16 kT liquid scintillator
4 kT PVC
32 cells/extrusion
12 extrusions/plane
15.7m
1302 planes
Cell dimensions:
3.9 cm x 6 cm x 15.7m
(0.15 X0 thickness)
Extrusion walls:
3-4 mm outer
2-3 mm inner
U-shaped 0.8 mm WLS
fiber into APD
DoE Review
89 m
31-plane
block
15.7m
Admirer
August 21, 2006
Gary Feldman
1.65 GeV neN  ep0
DoE Review
August 21, 2006
Gary Feldman
Harvard Contributions
to NOnA



Collaboration management (GF co-spokesperson)
Building the physics case for NOnA
NOnA electronics and DAQ (John Oliver project
electronics engineer )
DoE Review
August 21, 2006
Gary Feldman
What We Know and
What We Don’t Know
O. Mena and S. Parke, hep-ph/0312131
DoE Review
August 21, 2006
Gary Feldman
3 s Sensitivity to q13  0
DoE Review
August 21, 2006
Gary Feldman
Parameters Consistent with
a 2% nm  ne Oscillation
DoE Review
August 21, 2006
Gary Feldman
95% CL Resolution of the
Mass Ordering
DoE Review
August 21, 2006
Gary Feldman
1 and 2 s Contours for
Starred Point: sin2(2q13) = 0.02
DoE Review
August 21, 2006
Gary Feldman
Talks




Overview
MINOS nm  ne
MIPP
NOnA electronics
and DAQ
DoE Review
GF
Josh Boehm
Andre Lebedev
John Oliver
August 21, 2006
25 min
20 min
20 min
15 min
Gary Feldman